box for 2 memphis PR's

well
ive realized that im not really cut otu for teh whole box building thing
anythgin i do tends to explode, hahahah
anyways
ive got memphis PR12" '07s and a mclass 500.1 and im needin a box designmy only real max dimention is a 42" width
i'd really like to get decent highs, good mids, and great lows, but i still want it to ****in pound like no other.
any help would be greatly appreciated